Recently biometric sought more attention in the field of research and development. Mouse dynamics otherwise known as click dynamics is a biometric system which plays a predominant role in the field of network security. In this paper, enhanced click dynamics is introduced to ensure user authentication. The unknown cyber-attack detection process is developed using biometric system. In this paper, "Anytime algorithm" is integrated along with existing method to increase the accuracy in detecting the unauthorized user i.e., cyber-attacks. To evaluate the accuracy in detecting the unknown cyber-attacks by the proposed method the experiments were conducted with few performance metrics namely false acceptance rate, false rejection rate, authentication time and attack detection rate.